Reproductive success of Potomac River ospreys--1970

Chesapeake Science

1406_Wiemeyer.pdf

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Abstract

Osprey reproductive success on the Potomac River during 1970 is described. Thirty-five percent of the accessible active nests fledged young and only 0.70 young were fledged per active nest. Egg failure was the major cause of poor success. Reproduction was below that considered normal for a stable population.